Redesign and reimplement inventory menu

Add jewels but no implementation yet (needed redesign of inventory menu to function correctly)

Zennysoft.Game.Ma/src/items/EffectService.cs

@@ -213,20 +213,6 @@ public class EffectService
     SfxDatabase.Instance.Play(SoundEffect.TeleportToRandomRoom);
   }
 
-  public void ChangeAffinity(ThrowableItem throwableItem)
-  {
-    var maximumElements = Enum.GetNames(typeof(ElementType)).Length;
-    var newElement = ((int)throwableItem.ElementType + 1) % maximumElements;
-    throwableItem.SetElementType((ElementType)newElement);
-
-    // TODO: Make this an inventory animation to cycle through elements.
-    throwableItem.SetDescription(
-      $"Inflicts {throwableItem.ElementType} damage when thrown." +
-      $"{System.Environment.NewLine}Use item to change Affinity.");
-
-    throwableItem.SetCount(throwableItem.Count + 1);
-  }
-
   public void WarpToExit()
   {
     var exitRoom = _game.CurrentFloor.Rooms.OfType<ExitRoom>().Single();